Current Conditions

Arnold, Missouri

68°F20°C

Clear

Wind

SW 7 mph12 km/h

Humidity

66%

Cloud Cover

As of Tuesday, October 13, 2026 at 7:14 AM CDT

Today's Outlook

Day

Mostly clear and hot, with a high of 90°F32°C and morning low of 68°F20°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h.

Night

Mostly clear, with a low around 69°F20°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Clear	High 90°F32°CFeels 94°F34°C	Low 68°F20°C	Precip 0 in0 mm—	Cloud 10%	Wind SW 8 mph12 km/h	Tuesday: Mostly clear and hot, with a high of 90°F32°C and morning low of 68°F20°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h. Tuesday Night: Mostly clear, with a low around 69°F20°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h.
Rain	High 79°F26°C	Low 68°F20°C	Precip 0.46 in11.7 mm89%	Cloud 85%	Wind W 5 mph9 km/h	Wednesday: Overcast and warm, with a high of 73°F23°C. Light wind from the NW around 5 mph7 km/h. 89% chance of rain in the morning. Heavy, humid air. Wednesday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. 41% chance of light rain before dawn.
Light Rain	High 76°F24°C	Low 65°F18°C	Precip 0.39 in10 mm71%	Cloud 77%	Wind SW 7 mph12 km/h	Thursday: Overcast and warm, with a high of 76°F24°C and morning low of 66°F19°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 71% chance of light rain in the morning. Heavy, humid air. Thursday Night: Mostly cloudy, with a low around 65°F18°C. Breezy from the W at 7 to 12 mph12 to 19 km/h. 64% chance of light rain overnight.
Light Rain	High 62°F17°C	Low 48°F9°CFeels 43°F6°C	Precip 0.1 in2.5 mm60%	Cloud 78%	Wind NW 14 mph22 km/h	Friday: Overcast and mild, with a high of 54°F12°C. Windy from the NW at 15 to 16 mph24 to 26 km/h. 25% chance of drizzle in the morning. Dry air. Friday Night: Mostly cloudy, with a low around 48°F9°C. Breezy from the NW at 13 to 14 mph21 to 23 km/h. 60% chance of light rain overnight.
Clear	High 55°F13°C	Low 39°F4°CFeels 35°F1°C	Precip 0 in0.1 mm3%	Cloud 10%	Wind N 6 mph10 km/h	Saturday: Mostly clear and mild, with a high of 55°F13°C and morning low of 39°F4°C. Breezy from the NNE at 6 to 7 mph9 to 11 km/h. Dry air. Saturday Night: Mostly clear, with a low around 40°F5°C. Breezy from the N at 7 to 10 mph12 to 16 km/h.
Clear	High 62°F17°C	Low 38°F3°CFeels 33°F0°C	Precip 0 in0 mm—	Cloud 6%	Wind SSE 7 mph11 km/h	Sunday: Mostly clear and mild, with a high of 62°F17°C and morning low of 38°F3°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h. Dry air. Sunday Night: Mostly clear, with a low around 38°F3°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h.
Clear	High 67°F19°C	Low 44°F7°CFeels 41°F5°C	Precip 0 in0.1 mm3%	Cloud 32%	Wind SSE 7 mph11 km/h	Monday: Partly cloudy and mild, with a high of 67°F19°C and morning low of 44°F7°C. Breezy from the S at 7 mph11 km/h. Dry air. Monday Night: Partly cloudy, with a low around 45°F7°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdayOct 13	90°F32°C Feels 94°F34°C	68°F20°C	0 in0 mm· —	10%	Clear	SW 8 mph12 km/h
DayMostly clear and hot, with a high of 90°F32°C and morning low of 68°F20°C. Breezy from the SW at 7 to 8 mph11 to 12 km/h. NightMostly clear, with a low around 69°F20°C. Breezy from the SW at 8 to 10 mph13 to 15 km/h.
	WednesdayOct 14	79°F26°C	68°F20°C	0.46 in11.7 mm· 89%	85%	Rain	W 5 mph9 km/h
DayOvercast and warm, with a high of 73°F23°C. Light wind from the NW around 5 mph7 km/h. 89% chance of rain in the morning. Heavy, humid air. NightMostly cloudy, with a low around 68°F20°C. Breezy from the WSW at 6 to 8 mph10 to 13 km/h. 41% chance of light rain before dawn.
	ThursdayOct 15	76°F24°C	65°F18°C	0.39 in10 mm· 71%	77%	Light Rain	SW 7 mph12 km/h
DayOvercast and warm, with a high of 76°F24°C and morning low of 66°F19°C. Breezy from the SSW at 7 to 9 mph12 to 14 km/h. 71% chance of light rain in the morning. Heavy, humid air. NightMostly cloudy, with a low around 65°F18°C. Breezy from the W at 7 to 12 mph12 to 19 km/h. 64% chance of light rain overnight.
	FridayOct 16	62°F17°C	48°F9°C Feels 43°F6°C	0.1 in2.5 mm· 60%	78%	Light Rain	NW 14 mph22 km/h
DayOvercast and mild, with a high of 54°F12°C. Windy from the NW at 15 to 16 mph24 to 26 km/h. 25% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 48°F9°C. Breezy from the NW at 13 to 14 mph21 to 23 km/h. 60% chance of light rain overnight.
	SaturdayOct 17	55°F13°C	39°F4°C Feels 35°F1°C	0 in0.1 mm· 3%	10%	Clear	N 6 mph10 km/h
DayMostly clear and mild, with a high of 55°F13°C and morning low of 39°F4°C. Breezy from the NNE at 6 to 7 mph9 to 11 km/h. Dry air. NightMostly clear, with a low around 40°F5°C. Breezy from the N at 7 to 10 mph12 to 16 km/h.
	SundayOct 18	62°F17°C	38°F3°C Feels 33°F0°C	0 in0 mm· —	6%	Clear	SSE 7 mph11 km/h
DayMostly clear and mild, with a high of 62°F17°C and morning low of 38°F3°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h. Dry air. NightMostly clear, with a low around 38°F3°C. Breezy from the SSE at 7 to 8 mph12 to 12 km/h.
	MondayOct 19	67°F19°C	44°F7°C Feels 41°F5°C	0 in0.1 mm· 3%	32%	Clear	SSE 7 mph11 km/h
DayPartly cloudy and mild, with a high of 67°F19°C and morning low of 44°F7°C. Breezy from the S at 7 mph11 km/h. Dry air. NightPartly cloudy, with a low around 45°F7°C. Breezy from the SSE at 7 to 8 mph11 to 12 km/h.
	TuesdayOct 20	71°F22°C	49°F10°C	0.01 in0.3 mm· 4%	32%	Clear	SSE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 71°F22°C and morning low of 49°F10°C. Light wind from the SSE around 6 mph10 km/h. NightPartly cloudy, with a low around 49°F10°C. Breezy from the SSE at 7 mph11 km/h.
	WednesdayOct 21	72°F22°C	54°F12°C	0.06 in1.5 mm· 10%	35%	Drizzle	SSE 7 mph11 km/h
DayPartly cloudy and warm, with a high of 72°F22°C and morning low of 54°F12°C. Breezy from the SSE at 7 mph11 km/h. 10% chance of drizzle in the morning. NightPartly cloudy, with a low around 55°F13°C. Breezy from the SSE at 7 mph11 km/h.
	ThursdayOct 22	73°F23°C	58°F14°C	0.1 in2.6 mm· 18%	61%	Drizzle	S 7 mph12 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 58°F14°C. Breezy from the SSW at 7 mph11 km/h. 18% chance of drizzle in the morning. NightMostly cloudy, with a low around 58°F14°C. Breezy from the S at 7 to 8 mph12 to 12 km/h. 15% chance of drizzle overnight.
	FridayOct 23	71°F22°C	59°F15°C	0.16 in4.1 mm· 28%	70%	Light Rain	S 8 mph12 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 59°F15°C. Breezy from the S at 8 mph12 km/h. 22% chance of drizzle in the morning. NightMostly cloudy, with a low around 59°F15°C. Breezy from the S at 8 mph12 km/h. 28% chance of light rain overnight.
	SaturdayOct 24	68°F20°C	58°F14°C	0.24 in6.2 mm· 31%	70%	Showers	SSW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 58°F14°C. Breezy from the SW at 8 mph12 km/h. 31% chance of light rain in the morning. NightMostly cloudy, with a low around 58°F15°C. Breezy from the SSW at 8 mph12 km/h. 30% chance of showers overnight.
	SundayOct 25	64°F18°C	53°F12°C	0.11 in2.7 mm· 18%	62%	Drizzle	W 7 mph11 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 53°F12°C. Breezy from the W at 7 mph11 km/h. 18% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the WSW at 7 to 8 mph11 to 12 km/h. 17% chance of drizzle overnight.
	MondayOct 26	61°F16°C	50°F10°C Feels 47°F8°C	0.14 in3.5 mm· 17%	56%	Showers	WNW 6 mph10 km/h
DayMostly cloudy and mild, with a high of 61°F16°C and morning low of 50°F10°C. Breezy from the WNW at 7 mph10 km/h. 17% chance of showers in the morning. Dry air. NightMostly cloudy, with a low around 50°F10°C. Breezy from the W at 6 to 7 mph10 to 12 km/h. 17% chance of drizzle overnight.
	TuesdayOct 27	60°F16°C	48°F9°C Feels 45°F7°C	0.09 in2.2 mm· 13%	57%	Drizzle	W 7 mph11 km/h
DayMostly cloudy and mild, with a high of 60°F16°C and morning low of 48°F9°C. Breezy from the W at 7 mph11 km/h. 13% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 48°F9°C. Breezy from the WSW at 6 to 7 mph10 to 11 km/h. 10% chance of drizzle overnight.

Nearby Cities

Oakville5 mi8 km Mehlville6 mi10 km Concord6 mi10 km Affton8 mi14 km Lemay9 mi14 km Kirkwood11 mi17 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

Coordinates: 38.4328°N, 90.3776°W·Elevation: 184m·Timezone: America/Chicago·Population: 21,357